Figure 2.

Optical and FE-SEM images. (a) Optical image of the self-assembled periodic arrangement polystyrene spheres formed on silicon substrate. (b) Top-view and (c) cross-section magnification FE-SEM images of the self-assembled multilayer of polystyrene spheres.

Huang et al. Nanoscale Research Letters 2013 8:306   doi:10.1186/1556-276X-8-306
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